54018987561 has 160 divisors (see below), whose sum is σ = 105141991680. Its totient is φ = 26816832000.

The previous prime is 54018987527. The next prime is 54018987577. The reversal of 54018987561 is 16578981045.

It is a happy number.

54018987561 is a `hidden beast` number, since 540 + 1 + 8 + 98 + 7 + 5 + 6 + 1 = 666.

It is not a de Polignac number, because 54018987561 - 2¹⁵ = 54018954793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 54018987498 and 54018987507.

It is not an unprimeable number, because it can be changed into a prime (54018987461) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 18266695 + ... + 18269651.

It is an arithmetic number, because the mean of its divisors is an integer number (657137448).

Almost surely, 2^54018987561 is an apocalyptic number.

It is an amenable number.

54018987561 is a deficient number, since it is larger than the sum of its proper divisors (51123004119).

54018987561 is a wasteful number, since it uses less digits than its factorization.

54018987561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3117 (or 3108 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 54.

The spelling of 54018987561 in words is "fifty-four billion, eighteen million, nine hundred eighty-seven thousand, five hundred sixty-one".